I was in country about the same time you were. Sent you a scan from 1st Engineer Bn yearbook. If I remember this is Liberty Bridge. If you got oil on your feet it was probably my fault. I drove a 5000 gal. tanker and oiled the roads all over I Corps. This was to hold dust down and be able to see if anyone had planted mines. Most of the time I was alone, but sometimes had a shotgun riding with me.
Sometimes I would run the sweep truck (2nd truck in the convoy loaded with engineers) to An Hoa. Not sure about my spelling. The Bn rear was Camp Faulkner, located next to the Navy hospital, near Marble Mtn.